463453 – media-libs/mesa-9.1: performance regression on >=kde-base/kwin-4.9.4 with Lanczos shader

Bug 463453 - media-libs/mesa-9.1: performance regression on >=kde-base/kwin-4.9.4 with Lanczos shader

Summary: media-libs/mesa-9.1: performance regression on >=kde-base/kwin-4.9.4 with Lan...

Status:	RESOLVED FIXED

Alias:	None

Product:	Gentoo Linux
Classification:	Unclassified
Component:	[OLD] KDE (show other bugs)
Hardware:	All Linux

Importance:	Normal normal (vote)
Assignee:	Gentoo X packagers

URL:
Whiteboard:
Keywords:

Depends on:
Blocks:	463430
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Reported:	2013-03-27 10:47 UTC by Franz Trischberger
Modified:	2013-05-02 17:02 UTC (History)
CC List:	3 users (show)

See Also:	https://bugs.freedesktop.org/show_bug.cgi?id=61554 https://bugs.kde.org/show_bug.cgi?id=317427
Package list:
Runtime testing required:	---

Attachments
add workaround also for SandyBridge (disable_lanczosfilter_on_sandybridge.patch,836 bytes, text/plain) 2013-03-27 10:50 UTC, Franz Trischberger	Details
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Description Franz Trischberger 2013-03-27 10:47:58 UTC

kwin-4.10.1 contains a workaround for IvyBridge, but SandyBridge suffers from this, too.

Mesa report:
https://bugs.freedesktop.org/show_bug.cgi?id=61554

kde bug report:
https://bugs.kde.org/show_bug.cgi?id=313613

Comment 1 Franz Trischberger 2013-03-27 10:50:20 UTC

Created attachment 343395 [details]
add workaround also for SandyBridge

Comment 2 Andreas K. Hüttel archtester

2013-03-28 20:43:59 UTC

Where do you get the information that SandyBridge is also affected? I can't find it...

Anyway, not a regression, so no stable blocker.

Comment 3 Franz Trischberger 2013-03-29 07:35:09 UTC

I get that information from my eyes ;)
I have a SandyBridge CPU (i7 2600K with HD3000) and present windows is hardly usable:
https://bugs.kde.org/show_bug.cgi?id=317427
Also affected are several Task Switchers like Grid, Present Windows Clone or also the (IMHO default) Thumbnails.

Comment 4 Chí-Thanh Christopher Nguyễn gentoo-dev

2013-04-01 11:54:55 UTC

SandyBridge is mentioned in the upstream bug
https://bugs.freedesktop.org/show_bug.cgi?id=61554#c13

Comment 5 Michael Palimaka (kensington) gentoo-dev

2013-04-02 10:38:54 UTC

KDE upstream indicated that they are not interested in restricting SandyBridge, but say that the underlying issue has been fixed by mesa upstream.

Comment 6 Chí-Thanh Christopher Nguyễn gentoo-dev

2013-05-02 17:02:41 UTC

fixed in mesa-9.1.2